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5ae0dab6c5
This patch removes the implicit build of all shared libraries a target depends on. Targets only depend on the respective ABIs instead. This alleviates the need to locally build complex shared libraries (think of Qt) when developing applications. Instead, application developers can use binary depot archives. The implementation splits the mk/lib.mk file into three files: - mk/a.mk for building one static library (.lib.a) - mk/so.mk for building one shared object (.lib.so) - mk/abi.mk for building one ABI stub (.abi.so) Furthermore, the commit moves messages and the collection of build artifacts to var/libdeps, triggers the build of kernel-specific ld-<kernel>.lib.so, and prunes the lib-dependency tree at ABIs. Fixes #5061
140 lines
4.4 KiB
Makefile
140 lines
4.4 KiB
Makefile
#
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# Determine dependencies of a library from other libraries
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#
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# The following variables must be defined by the caller:
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#
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# LIB - library name
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# REPOSITORIES - repository directories to search for the library
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#
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ACCUMULATE_MISSING_PORTS = 1
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include $(BASE_DIR)/mk/util.inc
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all:
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@true
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LIB_MK := $(firstword $(wildcard $(addsuffix /$(LIB).mk,\
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$(foreach REP,$(REPOSITORIES),\
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$(addprefix $(REP)/lib/mk/spec/,$(SPECS))\
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$(REP)/lib/mk))))
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#
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# Determine the repository base directory from the absolute pathname
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# of the chosen libname.mk file. We need to specify the override
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# command because REP_DIR was first set by prg.mk when building a
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# program target. The repository of a library could be a different
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# one.
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#
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# Finally, we strip the trailing slash from the path. The slash was
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# used to match the whole directory in 'findstring'.
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#
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override REP_DIR := $(firstword $(foreach REP,$(REPOSITORIES),$(findstring $(REP)/,$(LIB_MK))))
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override REP_DIR := $(REP_DIR:/=)
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include $(LIB_MK)
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include $(BASE_DIR)/mk/dep.inc
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ifneq ($(UNSATISFIED_REQUIREMENTS),)
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WARNING_SKIP := "Skip library $(LIB) because it requires '$(UNSATISFIED_REQUIREMENTS)'"
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endif
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SYMBOLS := $(call _symbol_file,$(LIB))
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#
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# Sanity check to detect missing library-description file
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#
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ifeq ($(sort $(LIB_MK) $(SYMBOLS)),)
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WARNING_SKIP := "Library-description file '$(LIB).mk' is missing"
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endif
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ifneq ($(SYMBOLS),)
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SHARED_LIB := yes
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endif
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ifdef SHARED_LIB
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BUILD_ARTIFACTS ?= $(LIB).lib.so
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endif
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ifdef SHARED_LIB
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LIBS += ldso_so_support
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endif
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#
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# Hide archive dependencies of shared libraries from users of the shared
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# library. Library users examine the 'DEP_A_<lib>' variable to determine
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# transitive dependencies. For shared libraries, this variable remains
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# undefined.
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#
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ifdef SHARED_LIB
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DEP_A_VAR_NAME := PRIVATE_DEP_A_$(LIB)
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DEP_SO_VAR_NAME := PRIVATE_DEP_SO_$(LIB)
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else
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DEP_A_VAR_NAME := DEP_A_$(LIB)
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DEP_SO_VAR_NAME := DEP_SO_$(LIB)
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endif
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#
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# Trigger the rule generation for the ABI of this library
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#
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ifdef SHARED_LIB
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ifneq ($(SYMBOLS),)
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generate: generate_abi_dep.$(LIB)
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endif
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endif
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ifeq ($(filter $(LIBS_READY),$(LIB)),)
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all: $(if $(WARNING_SKIP),generate_skip,generate)
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endif
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log_progress:
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@echo "LIBS_READY += $(LIB)" >> $(LIB_PROGRESS_LOG)
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generate_skip:
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@echo $(WARNING_SKIP)
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@(echo "INVALID_DEPS += $(LIB)"; \
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echo "$(LIB).lib.a $(LIB).lib.so:"; \
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echo "") >> $(LIB_DEP_FILE)
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generate: $(call deps_for_libs,$(LIBS))
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ifdef SHARED_LIB
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ifeq ($(SYMBOLS),) # if no symbols exist, the shared object is the ABI
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@(echo "SO_NAME($(LIB)) := $(LIB).lib.so"; \
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echo "$(LIB).abi.so: $(LIB).lib.so"; \
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echo "$(LIB).lib.a:"; \
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echo " @true"; ) >> $(LIB_DEP_FILE)
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endif
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@(echo "$(LIB).lib.so: check_ports $(if $(SYMBOLS),$(LIB).abi.so) $(addsuffix .lib.a,$(LIBS)) $(addsuffix .abi.so,$(LIBS))"; \
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echo " \$$(VERBOSE)\$$(call _prepare_lib_step,\$$@,$(LIB),$(BUILD_ARTIFACTS))"; \
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echo " \$$(VERBOSE_MK)\$$(MAKE) \$$(VERBOSE_DIR) -C \$$(LIB_CACHE_DIR)/$(LIB) -f \$$(BASE_DIR)/mk/so.mk \\"; \
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echo " REP_DIR=$(REP_DIR) \\"; \
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echo " LIB_MK=$(LIB_MK) \\"; \
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echo " SYMBOLS=$(SYMBOLS) \\"; \
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echo " LIB=$(LIB) \\"; \
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echo " ARCHIVES=\"\$$(sort \$$($(DEP_A_VAR_NAME)))\" \\"; \
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echo " SHARED_LIBS=\"\$$(sort \$$($(DEP_SO_VAR_NAME)))\" \\"; \
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echo " BUILD_BASE_DIR=$(BUILD_BASE_DIR) \\"; \
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echo " SHELL=$(SHELL) \\"; \
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echo " INSTALL_DIR=\$$(INSTALL_DIR) \\"; \
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echo " DEBUG_DIR=\$$(DEBUG_DIR)"; \
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echo "") >> $(LIB_DEP_FILE)
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else # not SHARED_LIB
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@(echo "$(LIB).lib.a: check_ports $(addsuffix .lib.a,$(LIBS)) $(addsuffix .abi.so,$(LIBS))"; \
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echo " \$$(VERBOSE)\$$(call _prepare_lib_step,\$$@,$(LIB),$(BUILD_ARTIFACTS))"; \
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echo " \$$(VERBOSE_MK)\$$(MAKE) \$$(VERBOSE_DIR) -C \$$(LIB_CACHE_DIR)/$(LIB) -f \$$(BASE_DIR)/mk/a.mk \\"; \
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echo " REP_DIR=$(REP_DIR) \\"; \
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echo " LIB_MK=$(LIB_MK) \\"; \
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echo " LIB=$(LIB) \\"; \
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echo " ARCHIVES=\"\$$(sort \$$($(DEP_A_VAR_NAME)))\" \\"; \
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echo " SHARED_LIBS=\"\$$(sort \$$($(DEP_SO_VAR_NAME)))\" \\"; \
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echo " BUILD_BASE_DIR=$(BUILD_BASE_DIR) \\"; \
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echo " SHELL=$(SHELL) \\"; \
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echo " INSTALL_DIR=\$$(INSTALL_DIR) \\"; \
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echo " DEBUG_DIR=\$$(DEBUG_DIR)"; \
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echo "$(LIB).lib.so $(LIB).abi.so:"; \
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echo " @true"; \
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echo "ARCHIVE_NAME($(LIB)) := $(LIB).lib.a"; \
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echo "") >> $(LIB_DEP_FILE)
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endif
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